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P
I
P
I
N
G
W
O
R
P
I
P
I
N
G
W
O
R
1
2
.
1
2
.
12. Piping work and refrigerant charge
12.1 MAX. length allowed
Indoor unit
Height difference H
Max. Tube
Model
length(L)
15(m)
9K/12K
18K
20(m)
24K
30(m)
30(m)
36K
48K/60K
50(m)
*Do your best to reduce the pipe length. Long pipe may cause capacity decrease.
Refrigerant precharge for a piping length of 5m is charged in the outdoor unit at the
factory. When the piping is longer than 5m, additional refrigerant is necessary.
12.2 Oil trap
When the indoor unit is lower than outdoor unit and height is larger
than 5m, an oil trap should be used for every 5m.
K
A
N
D
R
E
F
R
I
G
E
K
A
N
D
R
E
F
R
I
G
E
Tube length L
Outdoor unit
Max. Height
Refrigerant
difference(H)
(exceed 5m)
7.5(m)
15(m)
15(m)
20(m)
30(m)
R
A
N
T
C
H
A
R
G
E
R
A
N
T
C
H
A
R
G
E
Add.
15(g/m)
15(g/m)
35(g/m)
35(g/m)
35(g/m)
114
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